ZHANG Xi-he,YANG Zai-qiang,CHEN Yan-qiu,et al.Effect of Low Temperature Stress on the Leaves Photosynthesis and Autioxidant Enzyme Activities of Four Species Greenhouse Crops in Northeast of China[J].Northern Horticulture,2015,39(10):15-23.[doi:10.11937/bfyy.201510004]
低温胁迫对东北四种设施作物叶片光合特性及抗氧化酶活性的影响
- Title:
- Effect of Low Temperature Stress on the Leaves Photosynthesis and Autioxidant Enzyme Activities of Four Species Greenhouse Crops in Northeast of China
- 文章编号:
- 1001-0009(2015)10-0015-09
- Keywords:
- low temperature; eggplant; sweet pepper; cucumber; photosynthetic characteristics; antioxidase activity
- 分类号:
- S 626
- 文献标志码:
- A
- 摘要:
- 为了研究低温对东北地区4种设施作物生理特性的影响,以茄子‘黑旋风一代’、番茄‘靓粉2号’、甜椒‘卡迪’、黄瓜‘碧露’为试材,于2013年9—12月在南京信息工程大学人工气候室,模拟寒潮动态降温过程,设计4个低温处理,最低气温分别为2、1、0、-1℃,系统研究了动态低温胁迫对4种作物叶片光合特性和抗氧化酶活性的影响。结果表明:动态低温胁迫处理明显抑制了4种设施作物叶片的光合速率,最低温度越低,处理时间越长,叶片光合速率下降越快,黄瓜、番茄在最低温度达0、-1℃,茄子、甜椒均于1℃时,叶片最大光合速率开始降为负值,Fv/Fm下降至0.4以下且无法恢复至对照水平。4种设施作物不同处理下超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性均呈先升高后降低趋势;丙二醛(MDA)含量呈现与保护酶相反的趋势。MDA含量为甜椒>茄子>黄瓜>番茄。研究表明茄子、甜椒在最低气温1℃,黄瓜0℃,番茄-1℃时,叶片光系统活性遭到不可逆伤害,4种设施作物抗寒性由大到小的顺序为:番茄>黄瓜>茄子>甜椒。
- Abstract:
- Eggplant‘Heixuanfeng Generation 1’,tomato‘Liangfen No.2’,sweet pepper‘Kadi’and cucumber‘Bilu’were selected as testing materials,the effect of low temperature on the physiological characteristics of the 4 greenhouse crops in Northeast of China were studied.From September to December in 2013,the dynamic temperature-fall period of cold wave was simulated at the phytotron of Nanjing University of Information Science and Technology.Four low-temperature treatment processes were designed,with respectively the lowest temperature of 2℃,1℃,0℃ and -1℃.Systematic study was conducted on the effect of dynamic low-temperature stress on the photosynthesis characteristics and autioxidant enzyme activities of the 4 crops.The results showed that apparently dynamic low-temperature stress restrained the photosynthetic rate of the leaves of the 4 greenhouse crops;the lower the lowest temperature became,the longer the time used for treatment lasted and the faster the photosynthetic rate of the leaf fell;when the lowest temperature of the cucumber and tomato came to 0℃ and -1℃,and the sweet pepper came to 1℃,the maximum photosynthetic rate of the leaf began to drop to a negative;Fv/Fm fell to below 0.4,unable to restore to the controlled level.In different treatment process,the activities of SOD,POD,CAT of the 4 greenhouse crops uniformly rose at first,and then fell.And the content of MDA changed opposite to protective enzyme.As for the content of MDA,sweet pepper>eggplant>cucumber>tomato.The study showed that when the lowest temperature for eggplant and sweet pepper came to 1℃,and that for cucumber and tomato respectively came to 0℃ and -1℃,the activity of leaf photosystem was irreversibly harmed.Performance in cold resistance of the 4 greenhouse crops was shown,in descending order,as follows:tomato>cucumber>eggplant>sweet pepper.
参考文献/References:
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备注/Memo
第一作者简介:张溪荷(1991-),女,河南郑州人,硕士研究生,现主要从事设施农业气象灾害等研究工作。